6 April 2021 07:47 in landslide report by Dave Petley
Two deadly landslides have occurred in Indonesia over the last few days. On the flanks of Mount Lewotolok up to 80 were killed in a lahar, whilst on Andonara island 69 people were killed and 19 are missing in a debris flow.
Tags: featured, indonesia, lahar, landslide report, SE. Asia
3 December 2020 08:14 in Uncategorized by Dave Petley
High resolution satellite images, collected by Planet Labs using the SkySat constellation, showing the impact of the Guinobatan lahar in the Philippines a month ago
Tags: featured, lahar, philippines, Planet Labs, satellite image, SE. Asia, typhoon
19 November 2020 08:35 in landslide report by Dave Petley
Over the weekend of 31 October and 1 November 2020, Super Typhoon Goni triggered a major lahar from the flanks of Mount Mayon in the Philippines
Tags: featured, lahar, philippines, SE. Asia, typhoon
17 March 2020 07:58 in landslide report by Dave Petley
In 1919 a devastating eruption of Mount Kelud in Indonesia triggered massive lahars that killed 5,160 people on the flanks of the volcano
Tags: featured, indonesia, lahar, SE. Asia, volcano
9 October 2017 06:44 in Review of a paper by Dave Petley
A new paper from the University of Bristol (Brown et al. 2017) demonstrates the role that lahars play in causing loss of life in volcanic events
Tags: debris flow, eruption, featured, lahar, lahars, review of a paper, volcano
21 December 2012 10:10 in by Dave Petley
Lahars are extraordinarily energetic debris flows that originate in volcanic materials. They are one of the most poorly understood volcanic processes, even though they are exceptionally destructive. Lahars have been responsible for thousands of deaths in the last century – the 1985 lahar from Nevado del Ruiz in Colombia is believed to have killed over 23,000 people for example. Those sorts of numbers are hard to believe unless you have …
28 June 2011 07:05 in landslide video by Dave Petley
Youtube has a remarkable new video of a debris avalanche / lahar that occurred on Mount Rainier in Washington State, USA on 25th June: Unfortunately there is little information about the event. Anyone have any details? Updated: There are further details about this landslide on the Mount Rainier Climbing blog. The wonderful Eruptions blog also provides further details (as well as linking to this post).
Tags: USA, video
10 September 2010 21:05 in Uncategorized by Dave Petley
One of the many highlights of the splendid IAEG Congress in Auckland this week was a talk by GNS geologist Chris Massey on the 18th March 2007 lahar at Mount Ruapehu on North Island. The lahar occurred as a result of the failure of a tephra wall holding back the crater lake at the summit, and is shown by this NASA image: The potential for a lahar had been anticipated …
Tags: lahar, New Zealand, volcanic landslide
24 November 2009 23:26 in Uncategorized by Dave Petley
In an earlier post today I highlighted the availability of satellite imagery covering the El Salvador lahar disaster, triggered by Hurricane Ida earlier this month. Whilst sitting in a conference session this morning it occurred to me that the Disaster Charter, which provides satellite images for disaster relief and recovery operation, was also triggered by this event. So I had a quick look at the web page for this triggering …
Tags: El Salvador, hurricane, Hurricane Ida, lahar, satellite, satellite imagery
24 November 2009 09:54 in Uncategorized by Dave Petley
NASA has released before and after satellite images of the lahars (volcanic debris flows) triggered by Hurricane Ida in El Salvador earlier this month. The final toll of the landslides remains unclear, over 60 is the widely reported statistic. The images are false colour composites collected by the ASTER instrument. These images differentiate between vegetation, which appears as red colours, and bare ground, which appear as a blue-grey colour. Such …
Tags: El Salvador, hurricane, Hurricane Ida, lahar, satellite, satellite imagery
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